Current dependence of performance of TES microcalorimeters and characteristics of excess noise

Y. Takei, R. Fujimoto, Y. Ishisaki, U. Morita, K. Tanaka, T. Koga, K. Mitsuda, T. Ohashi, N. Y. Yamasaki, N. Iyomoto, T. Ichitsubo, K. Sato, T. Fujimori, T. Oshima, K. Futamoto, K. Shinozaki, T. Morooka, S. Nakayama, K. Yoshida, N. TakaiK. Chinone

研究成果: Contribution to journalArticle査読

4 被引用数 (Scopus)

抄録

We are developing transition edge sensor (TES) microcalorimeter arrays for future Japanese astronomy missions. Although 6.6 eV energy resolution for 5.9 keV and 74 μs decay time are achieved, our energy resolution was limited by the excess noise of unknown origin. The dominant noise showed 1/R dependence and it only appeared when the current through the TES, I, is larger than 10 μA. This is explained if we assume a constant voltage noise source with a level of ∼2(4kTCRn)1/2. We also investigated the influence of I on the TES performance and found the TES sensitivity α is reduced when the ratio of current to the critical current I/IC is large. It can explain the reduction of α observed when operated without a magnetic shield. We also found a strong correlation between IC and α or the baseline width. Thus, we conclude that IC is an essential parameter for the TES performance.

本文言語英語
ページ(範囲)340-343
ページ数4
ジャーナルNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
520
1-3
DOI
出版ステータス出版済み - 3 11 2004
外部発表はい

All Science Journal Classification (ASJC) codes

  • 核物理学および高エネルギー物理学
  • 器械工学

フィンガープリント

「Current dependence of performance of TES microcalorimeters and characteristics of excess noise」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル